Ventilator



Nov. 30 1926.

C. M. POETSCH VENTILATOR Filed Dec. 2, 1921 2 Sheets-Sheet 1 J (z sienjgaeisc Nov. 30 1926.

c. M. POETSCH VENTILATOR Filed Dec. 2, 1921 2 SheetsSheet 2,

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Patented Nov. 30, 1926. UNITED STATES 1,608,667 PATENT OFFICE.

CHESTER I. POETBCH, OF CHICAGO, ILLINOIS.

VENTILATOR.

Application filed December 2, 1921. Serial No. 519,312.

The present invention relates more particularly to window ventilators,such as are applied to the window casing when a window is opened, tocover the opening and per- 5 mit air to pass through, atthe same timeshutting out as much as poss1ble of the dust floating in the air. Amothe ob ects of this invention areto e-an air screen for an open window w'ch-iwillbreak up any 10 draft which might blow pan-"a erson n the room;to providea [screen-w 1011 will keep out a maximum part ofs the dust anddirt carried by the air, as well as rain and snow; to provide a screenofthe character 1 stated which can be easily appl ed and detached orwhich can be left attached but easily rolled up to get: the screen awayfrom the openingwhen '1t..1s not desired to use it; to provide a.screengof water- 20 proof porous material which isheld taut by a springroller at one SldB Of a w ndow; to

' provide a screen of theflharacter stated in which the door of thescreen-box is automatically held closed "by the screen cloth when not inuse; to provide'a'structure of the character stated which 'fits close tothe window sash when in use 'to reduce to a minimum the amount of dirtand dust which may blow through; andsuch further objects, advantages andcapabilities as will later more fully appear.

My invention further resides in the combination, construction andarrangement of parts illustrated in the accompanying drawings, and whileI have shown therein a preferred embodiment of my invention, I desirethe same to be understood as illustrative only and not as limiting saidinvention.

in the drawing annexed hereto and forming a part hereof,

Fig. 1 is a perspective view of my new screen detached from the windowcasing.

Fig. 2 is a similar View of the diagonally opposite corner from thatshown in Fig. 1.

Fig. 3 is a perspective "iew of my new construction with the fabricpartially unrolled.

Fig. 4 is a fragmentary perspective view of one side of a window showingthe securing means attached to the casing whereby the screen may beattached in position Fig. is a detached perspective view of the endmembers which serve as closure means for the ends of the box and assupports for the ends of the roller upon which the screen fabric isrolled.

Fig. 6 is a sectional end view of my new screen showing the relationshipof the parts when the screen is rolled up and the box closed.

Fig. 7 is a similar View showing the door of the'box open and the fabricpartly drawn out.

Fig. 8 is a broken longitudinal section designed to show therelationship of the parts within the box.

F'g. 9 is a broken longitudinal section substantially along the planeindicated by the line 9--9, Fig. 6.

Fig. is a sectional plan to show how my invention is applied to thewindow casing.

Fig. 11 is a fragmentary vertical section through a window to show howclosely the screen fits and how little chance there is for dust and dirtto get past the same.

Referring more in detail to the drawings numeral 1 designates thesubstantially rectangular box of my invention in which is housed (whennot in use) the flexible porous fabric 2 having its edges reenforced asshown at 2 by any suitable means, such as strips of more or less rigidfabric, very thin metal strips or by being rubberized. A wall 3 of thebox 1 is hinged as shown in Fig. 1 to permit the same to be opened sothat the interior may be conveniently gotten at. This door 3 is providedat its opposite ends with lugs 4: which support a rod 5 whichco-operates with the fabric 2 and binding member 6 to hold the doorclosed as shown clearly in Fig. 6. The binding member 6 is provided asshown with a handle 7 by means of which the fabric may be drawn out ofthe box. The binding member 6 has therein a pair of openings 8 whichhave their ends enlarged as shown clearly in Fig. 3. Similar slots 9 and10 are provided in two adjacent walls of the box 1 to cooperate withheaded fastening members 11 in holding the box in position on a windowcasing. These headed fastening members may be either screws or nails orother similar devices as found most desirable. Other similar fasteningmembers 12 are secured to the other side of the window casing to beengaged by the slots 8 in member 6.

Secured inside of the respective ends of the box 1, are supportingmembers 13 and 14 which have formed as a part thereof a pair of cups 15and 16 which are apertureil at 17 and 18 as shown for the reception ofthe ends of a roller 19, such as an ordinary shade roller. The ends ofthe box walls are flanged over and the flanges rest between the twoparts of the supporting members. When the parts are in proper assembledposition, as shown, they may be secured together by any suitable means,such as soldering.

Punchings 20 are made in the end members and bent inwardly so that anend of lugs 4 on the door 3 may engage the same to prevent the door fromswinging inwardly too far.

Attention is called to the fact that the slots 8, 9 and 10 are soconstructed that the screen may be applied either end up with equalfacility, so that the box may be at either the right or the left side ofthe W111: dow. Slots 10 will ordinarily not be used since it isdesirable to get the screen 2 as close to the window sash as possible,but, if desired, the slots 10 may be applied to the headed members 22,shown in Fig. 10, in which case slots 8 would be applied to member 23,thus forming an air space between the screen and the lower portion ofthe window sash.

It is clear that when the screen has been applied as shown in Fig. 10the door 3 may be closed and will then serve to hold the fabric close tothe bottom of the window sash. From this it is clear that there is aminimum of 'space between the sash and screen for the entrance of dustand dirt carried by the wind. It is also obvious from Fig. 6 that thetension of the spring will pull the fabric 2 against rod 5 in such a wayas to normally hold the door 3 closed. This arrangement automaticallycloses the door when the fabric is permitted to roll up inside of thebox.

It is of course understood that the specific description of structureset forth above may be departed from without departing from the spiritof my invention as set forth in this specification and the appendedclaims.

Having now described my invention,

I claim 1. A window ventilator comprising a flexible porous stripadapted to be stretched across an opening in a window, means for.

winding the strip, a housing therefor and comprising a tubular body, andend pieces of sheet metal bent in the form of a U to provide a slottherein, said body having inwardly extending flanges slidably extendinginto said slot whereby the end pieces are secured to the body.

2. In a ventilator, a roll, a porous strip wound on the roll and capableof being stretched across a framed opening, a spring for winding thestrip on the roll and for holding the strip taut when stretched, ahousing for the roll and the strip when wound thereon, and having anopening, a movable closure therefor, the closure having means pressingthe strip close to the frame of the opening when in closed position.

3. In a ventilator, a roll, a porous strip wound upon the roll andcapable of being stretched across a framed opening, a spring for windingthe strip upon the roll and for holding the strip taut when stretched, ahousing for the roll and the strip when wound thereon, and having a sideopening therein, a movable closure for said opening, the closure havingmeans pressing the strip close to the frame of the opening when inclosed position, the closure having means engaged by the strip wherebythe winding of the strip upon the roll automatically closes the closure.

{1. A ventilator of the type disclosed, comprising a roll, a flexiblestrip capable of bein wound on said roll and being stretched across anopening of a window, a casing enclosing said roll and having an openingto permit the passage of said strip when being stretched or wound, arigid member at the free end of said strip and having a portion thereofextending through said opening and into said casing when the strip iswound on said roll, and means located within the casing and preventingtllv further entry of said member.

In witness whereof, I hereunto subscribe my name to this specification.

, CHESTER M. POETSCH.

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